Auxiliary heater for stoves.



W. PETT.

AUXILIARY HEATER FOR STOVES.

APPLICATION FILED SEPT. 1,1906.

Patented Feb. 16, 1909.

WILLIAM PETT, OF MUSKEGON, MICHIGAN.

AUXILIARY HEATER FOR STOVES.

Specification of Letters Patent.

Patented Feb. 16, 1909.

Application filed September 1, 1906. Serial No. 332,984.

T allcuhom it may concern: Be it known that I, \VILLIAM Pn'r'r, acitizen of the United States, residing at Muskegon, in the county ofMuskegon and State of .Michigan, havev invented a new and usefulAuxiliary Heater for Stoves, of which the following is a specification.

This invention relates to an auxiliary heating device designed for usein Connection withstoves for heating living rooms, so as to utilize theheat units of the fire gases which would otherwise pass to the chimneywithout the heating energy being fully abstracted.

The invention has for one of its objects to i provide a device of thischaracter composed of a. plurality of lengths of conductors connected inseries relation so as to produce a relatively long, circuitous path'forthe products of combustion from the stove or other heating apparatus tothe point of final exhaust, for abstracting practically all the heat. Afurther object of the invention resides in the en p oynient of a draftdevice whereby the auxiliary heating apparatus can be cut out of serviceduring time of excessive heat, by permitting the products of combustionto pass directly to the chimney, or when it is desired to obtain amaximum draft for kindling a fire.

Another object is to maintain a substantially constant draft through theapparatus by means of aby-pass for the products of combustion arrangedin shunt. relation to a will appear as the nature of the invention isbetter understood, the invention comprises the various novel features ofconstruction and arrangement of parts, which will be more fullydescribed hereinafter and set forth with particularity in the claimsappended hereto.

In the accompanying drawing, which illustrates certain of theembodiments of the invention, Figure 1 is a perspective view of theauxiliary heating apparatus shown in connection with an ordinary heatingstove. Fig. 2 is a detail view in section of the lower end of thedevice.

Corresponding parts in the several figures are indicated throughout bysimilar characters of reference.

The device shown in Figs. 1 and 2 is what may be termed a double returnheater, that is to say, the fire gases pass downwardly that durin normal.0 eration. the conductorat the point whereit enters the chimney-is ofabout the same temperature as the airof the apartment being warmed bythe stove and auxiliary heater, thus illustrating that practically allof the available heat units are abstracted.

Specifically, the device comprises two outer conductors 11 and 12 whichat their lower ends communicate with a horizontal receiver box orradiator .13. The upper end of the conductor 11 suitably connected withthe combustion space of the stove by this uptake M and the double elbow15, or equivalent means. The upper end of the other conductor 12 isconnected with the intermediate conductor 16 by a double elbow or returnconnection 17. The lower end of the conductor 16 communicates with theexit pipe 18 either directly or through a smaller 01' secondary receiverbox or radiator 19. The several conductors are disposed parallel withtheir long dimension vertical, so as to be as compact as possible. Thetwo receiver boxes 13 and it) are independent of each other and each isprovided with a slide 20 that normally covers an opening through whichthe boxes can be cleanedof soot. The device '19 supported on the floorby means of legs 21 on the large receiver lb, which legs support thedevice directly off the floor, so that the intense heat will not bedangerous. t will tl 111s be seen that the course of the products ofcombustion through the device is comparatively long, so that. a largeheat radiating surface produced. In order to permit a maximum draft tobe obtained, or to shunt the hot gases directly to the chimney, the exitconductor 18 and uptake lat are directly connected by a short connectionor pipe 22. This short pipe is provided with a damper which isconstructed 'to completely out off con'muinication directly from theconductor l-l to the exit conductor 18, when the damper is turned atright angles to the position shown. Thus, when the damper is closed. theauxiliary heater is cut into service and the products of combustion passthe full length thereof.

which coiiperates with the damper 23 for regulating the draft. At thedamper 24',

: whiehlatte? ismalso constructed so as to be capable of completelyclosing the pipe in which itis located, is provided a restrictedlay-pass 25 of practically ,the same nature as that described inconnection with Fig. 3. In this by-pass is arran ed a controlling damper26. In norma operation, the dampers and 24: are turned to their closedposition and the damper 26 is opened. The fire gases thus pass from thestove "vided withsuitable bafiie plates;

through the auxiliary heating device and' discharge to the chimney orpoint ofv final exit through the restricted by-pass. While in thiscondition, the draft can be regulated bythe by-pass damper 26 when closeregulation is desired. By manipulating the dampers 23-and 24;, a coarserregulationris obained. The reservoirs 13 and 19 are'prd The auxiliaryheat radiating device is comparatively inexpensive, and easy to make,since the conductors are made up of stove pipe section and the receiverorradiator boxes of sheet metal. The parts are com- ,pactly arranged, sothat the device takes up little space compared. with its capacity, andcan be placed conveniently behind the ordinary stove, such as .27, Fig.l, where it will be largely concealed and out of the way.

I have described the principle of operation of the invention, togetherwith the appa ratus. which I now cons der to be'the best box to the rearof the base th stove, an

uptake pipe connected to the to a returnbend connected to the upper endof the uptake pipe, a downcomer pipe ccnnect ng "Y'l ,"Qw' {the returnbend to the top df the radiator box near one end thereof, 'a seconduptake pipe leading from the top of the box at the opposite end, asecond return bend at the upper-end of the second hptake pipe, a secondradiator: box positioned on top of the first mentioned-boxibetween thepipes compipe leading from the second return bend to the top of thesecond box near the end adj'acent the uptake from the first box, a thirduptake pipe leading from the ,top of the second box near the oppositeend, a bypass pipe leading from the first u take to the third uptake,and a damper he d in the bypass pipe? 2.: In /combination with a stove;a radiator box to the rear of the base of the stove, an uptake pipeconnected to the stove,'a return, bendconnectedto the upper end of theuptake pipe, a downcorner pipe connecting the return bend to the top ofthe radiator box near one end thereofla second uptake-lead ing from thetop of the box at the opposite end, a second return bend'at the upperend of the second uptake pipe, a second radiator box positioned on topof the first mentioned the second return bend-"to. the top of the secondbox near the en adjacent the uptake from the first box, EU 'rd uptakepipe leadas my own, I have hereto 'afiixed my signature in the presenceof two w tnesses.

WILLIAM PETT.

/Vitnesses 2 CAROLYN Mortars, Jizssni URQUHART.

municating-there-with, a second downcomer box between the pipescommunicating therewith, a seconddowncomer pipe leading from 1 Intestimony that I claim the foregoing ing from the top or'the second boxnear the

